In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ata: libata-scsi: bound the ATA passthru sense descriptor writes<\/p>\n
When an ATA PASS-THROUGH command to an ATAPI device fails, the sense
\nbuffer holds the device’s REQUEST SENSE reply, and
\nata_scsi_set_passthru_sense_fields() trusts its additional length
\nbyte, sb[7], when adding the ATA Status Return descriptor. A faulty
\nor malicious device can use that to make the kernel read and write
\npast the 96-byte buffer in three ways:<\/p>\n
– scsi_sense_desc_find() is passed sb[7] + 8 as the buffer length, so
\n its clamp against sb[7] does nothing and the walk runs off the end.
\n– A type-9 descriptor found near the end is filled in unchecked.
\n– A new descriptor at sb[8 + len] needs len + 22 bytes, not len + 14,
\n so len 75..82 writes up to 8 bytes past the end.<\/p>\n
Reproduced with KASAN under qemu, with the emulated ATAPI REQUEST SENSE
\nreply patched:<\/p>\n
BUG: KASAN: slab-out-of-bounds in scsi_sense_desc_find+0x1a5\/0x210
\n BUG: KASAN: slab-out-of-bounds in ata_scsi_qc_complete+0x1a15\/0x1a50<\/p>\n
Both are gone with this patch, and a valid descriptor is still filled
\nin.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ata: libata-scsi: bound the ATA passthru sense descriptor writes<\/p>\n
When an ATA PASS-THROUGH command to an ATAPI device fails, the se<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41017","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41017","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=41017"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41017"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41017"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}